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MILWAUKEE -- Video appears to show a woman pouring gasoline through the window of a Milwaukee home before setting a fire that killed a 72-year-old man, Fox6Now reports.

Milwaukee police say Willie Greer died in the fire, which they are investigating as a homicide and arson.

Jestopher and Jessie Hinds and their cousin Travonta Richmond say they watched nearby as the woman broke out a window before grabbing what appears to be a gas can from the garage and pouring it through a window.

"She asks us, 'one of y'all got a lighter?' And were like, 'no, we can't help you with a lighter,'" Richmond told the station.

As the fire spreads, the video shows a woman jumping through a window to escape the flames. A group of young men attempted to kick in a door to help the people trapped inside but black smoke pushed the group away.

"We all ran over there and tried to kick down the door, but all the smoke -- nothing we could really do at that moment," Jestopher said.

Relatives say the woman got into a fight with her boyfriend, which provoked the incident. They said her boyfriend lived at the home but wasn't there at the time of the fire.